Updated 10:40 am, Thursday, May 25, 2017

Power lines running atop the Walk Bridge in Norwalk, Conn. Friday, October 7, 2016. As the Connecticut Department of Transportation prepares to replace the Walk Bridge, Eversource Energy must put forward its plan to replace and/or relocate power lines running atop the existing 120-year-old bridge. less

Power lines running atop the Walk Bridge in Norwalk, Conn. Friday, October 7, 2016. As the Connecticut Department of Transportation prepares to replace the Walk Bridge, Eversource Energy must put forward its ... more

The rerouted transmission lines would go below ground at the Norwalk Police Department headquarters parking lot at 1 Monroe St., run below Elizabeth Street, go under the harbor from 90 Water St. and emerge at the north end of the Visitor’s Docks parking lot, according to a map provided by Eversource.

“We’re going to be putting in splice vaults and then trenching our way out of the parking lot,” said Marcia Wellman, transmission senior project manager for Eversource.

“We certainly will be occupying some parking areas temporarily while the work is going on,” Libertine told The Hour. “But in terms of use of the docks, that type of thing, I think the goal is to try to do that off-season as much as possible.”

A map provided by Eversource shows the northern half of the Visitor’s Docks parking lot shaded and used as temporary easement. A similar temporary easement at 90 Water St., however, would be the principle work area, according to Eversource.

From the Visitor’s Docks, the new transmission lines would continue underground below Fort Point Street and emerge above ground at the railroad tracks.

The on-land portion of the project is not the only concern for the Harbor Management Commission.

Commissioner John T. Pinto noted the new transmission lines would run under the harbor bed close to the northern-most docks. Such placement could limit repairs or additions to the docks and pilings that support them, according to the commission.

This coming winter, the Norwalk Department of Recreation and Parks plans to replace the docks and install steel pilings to support them.

Pinto suggested Eversource rethink the route and have the transmission lines emerge at Veterans Memorial Park well south of the Visitor’s Docks area.

Wellman said such a route would require another splice vault, but she indicated Eversource would explore the idea. The company has yet to finalize its plans, and much review and permitting lies ahead.